Kate Hudson, Matthew Bellamy Having Relationship Problems: It's Not Good Right Now

Kate Hudson and her fiance of three years, Matthew Bellamy, who share son Bing, 2, are having relationship problems, sources tell Us WeeklyCredit: Dave M. Benett/Getty Images

No wonder Kate Hudson isn't rushing down the aisle. The Bride Wars actress and her fiance of nearly three years, Muse rocker Matthew Bellamy, have been having problems lately and are rethinking their engagement, multiple sources confirm to Us Weekly.

"They realized they are in different places in their lives. They grew apart," one insider tells Us of the couple, who have a son together, 2-year-old Bing. Adds another source: "It's not good right now. They're taking time apart to try to make things work."

Indeed, Hudson, 34, and Bellamy, 35, have not been photographed together for some time. Last month, she showed up solo to the 2014 Sundance Film Festival in Park City, Utah, where she promoted her new movie Wish I Was Here with costar and director Zach Braff. She also went without a date -- and without her engagement ring -- to Bulgari's Decades of Glamour event on Tuesday, Feb. 25.

"She looked like a supermodel," an onlooker told Us of the star, who stunned in a white miniskirt and yellow blouse. "She seemed to be in a great mood."

Another source notes that she and Bellamy haven't yet given up on their relationship completely. "Matt loves Kate and Bing immensely, so hopefully they can work through it," the insider tells Us.

Together since the spring of 2010, the couple got engaged a year after meeting and then welcomed son Bing a few months later. (The actress also has a 10-year-old son, Ryder, with ex-husband Chris Robinson.) Since then, however, they've made no plans to officially tie the knot.

"I'm planning nothing right now. I'm so busy, we've been so busy, and it's been great. I come from an unconventional family -- they're not married, my parents aren't married," Hudson told Kelly Ripa and Michael Strahan in January of mom Goldie Hawn and her longtime partner Kurt Russell. "So there's a part of me that goes, 'If I'm going to do it, I'm going to do it right. And I'm going to take the time to really plan it right...And it's a lot...So, no. Not anytime soon, no."